Improvement in watchmen s time-checks



T. HAHN;

Watchmens Time-CheksI N0,l56,729, Patented Nov, 10,1874r THE GRAPHIC QDHOTO-LITHJSIniI PARK PLACE'N.

UNITEn STATES PATENT OFFICE.

THEODORE HAHN, OF STTTGABT, GERMANY.

IMPROVEMENT IN WATCHMENS TIME-CHECKS.

Specification forming part of Letters Patent No. 156.729, dated November 10, 1874; application ledr September 19, 1874.

To all whom it may concern:

Beit known that I, Tr-IEoDoRE HAHN, of Stuttgart, in the Kingdom of Wurtemburg, Germany, have invented a new and Improved Watchmans Time-Check, of which the following is a specification:

In the accompanying drawing, Figure l represents a top or face view of my improved watchmans time-check with the lid thrown open; Fig. 2, a bottom view of the same, showing rotating and mfrking devices; Fig. 3, a vertical side elevation of the time-check, partly in section on line c c, Fig. l; Fig. 4, a sectional rear view, showing rotating ratchet-dial and spiral pawl; and Fig. 5, a vertical transverse section of the time-check on the line x x, Fig. 3.

Similar letters of reference indicate corresponding parts.

The object of my invention is to furnish an improved watchmans time-check that is operated without a clock-train, but produces, by the action of the keys at the stations, simultaneously, the rotating of the dial and the suitable marking of the numbers of the stations on the dial, so that a simple and effect ive check, without the expense of the clocktrain, is obtained.

My invention consists of the arrangement of a dial in connection with a disk, rotated by the action of the keys at th'e various stations, on a ratchet-wheel at the under side of the same, to produce the forward motion simultaneously with the action of the keys on the spring marking devices.

In the drawing, A represents the face-dial, of paper or other suitable material, which indicates in time checks the hours and minutes, and, by radial outer subdivisions, markingcolumns for the numbers of the stations. The dial A is attached by pins and fastening center piece to a base-disk, B, that slides, by its project-ing top ange a, on the main or supporting plate C, to which the marking mechanism is applied. The under side of disk B is provided with a ratchet, B', constructed with a number of teeth corresponding to the minute subdivisions of the dial, so that when, for instance, the time-check is arranged for six stations, and the hour-space on the dial subdivided into six parts, each tooth will move the dial forward for one-sixth of an hour, or ten minutes; and, when the timecheck is arranged for twelve stations, the hour is subdivided into twelve parts, or five minutes, and the ratchet provided with a corresponding number of teeth, each tooth will move the dial forward over one-twelfth part of an hour, or tive minutes. A spring-pawl, D, is pivoted to a sliding plate, D', and engages the teeth of ratchet B, moving in a recess, l), of the vertical supporting-plate C', sidewise of which the sliding plate D' is guided by suitable lugs and stops d, and acted upon by a band-spring, c, for being carried back again. A downward extension, f, of sliding plate D', with inclined iiange f', is engaged by wards on all the keys, so that, when any key is inserted, it will carry the sliding plate sidewise, and move thereby, by the springpawl, the ratchet-dial forward one tooth, a spring checkpawl, g, of the same securing the exact motion ofthe dial. A spring guard or cheek, 7L, of plate C', is placed sidewise of the barrel-pin, opposite to the inclined dan ge of the sliding plate, for preventing the turning of the key in wrong direction. rlhe spring lever-arms E are pivoted, in the usual manner, to bearings of the siuiporting-plates, and carried in upward direction by the wards of the marking keys, ot' which each key corresponds with a lever-arm and a number or other mark at the end of its upward projecting arm, which projects through a slot of the main plate and the top guide-ring, so as to press irmly the rotating dial against the bridge F, and mark thereby consecutively the stations as the watchman visits them.

After the key is inserted and turned, it engages irst the sliding plate with pawl for carryin g the dial forward, and then, by the ward, the corresponding marking-lever, for marking thereby, at one turn of the key, the station on the dial in the exact radial subdivision required. 'lhe dial will, therefore, indicate whether or not all the stations have been visited, forming, especially when the stations are arranged at suitable distances, also an approximately-exact record as to the time visited.

Therotatingand markingdevices areinclosed in a casing of the usual shape and size, which is opened and locked, for setting the dial and substituting a new one, as in the timechecks patented heretofore.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

l. As an improvement in Watchmens time detecter, operated Without clock -train, the combination of the rotating ratchet-disk and dial, operated by spring pawl and sliding spring-plate, with the pivoted spring marking devices, both being actuated by the markingkeys at the stations, indicating thereby the numbers of the several stations, substantially in the manner and for the purpose set forth.

2. In Watchmens time-checks, the combition of dial-bearing disk and ratchet B B', sliding, by circumferential flange a, on supporting-plate C, with spring-pawl D and its THEODORE HAHN. /Vitnesses:

ALBERT PERLEN, GoT'rLoB DENZINGER. 

